🏜️ Desert Sandstorm Physics (2D Grain Layer and Visibility)

2D desert sandstorm: log wind profile, Bagnold/Fecan sand threshold, saltating grains with drag, dust emission, Rouse suspension and Koschmieder visibility. Same engine and four checks as the 3D page.

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install